Thermometer



1,633,5 June 28 1927' M. E. MOELLER 99 THERMOMETER Filed July 18; 1919 lNvENToR ma@ gh BY I ATTORNEY Patented June 28, 1927.

UNITED STATES MAX n. MOELLER, or BROOKLYN, NEW YORK.

THERMOMETER.

Application filed July 18,

The improvements relate to thermometers and are designed more particularly to be used in connection with the thermometers of a thermostat. Devices of this kind are commonly used to operate mechanism or sound anfalarm or operate other mechanism when the temperature of the surrounding atmosphere or fluid reaches a certain point, and are employed for many purposes. It has been found, however, that when used on moving objects, such as vessels, or in any Votherenvironment where a thermometer is subjectedto sudden shocks or vibration, the mercury or other expansiblc fluid in the thermometer will become disturbed and will sometimes cause the thermostatic apparatus to operate prematurely or render the instrument inoperative. This fault will'be understood when it is considered that the liquid inthe thermometer' is very fluent and is located in the lower part of a tube, from which the air has been exhausted; A sudden shock or unusual vibration will cause the liquid inthe tube to separate and a portion of it to rise therein, and perhaps close the electrical circuit, causing a false alarm or an yaccidental operation of the apparatus controlled by the thermostat. lVhen it is considered that in some vessels each comf partment is provided with a thermostat device, and thatif one of them is caused to operate accidentally the entire vessel, with perhaps thousands of persons aboard, is given an alarm, it will be seen that the objection here noted is a serious one. In other uses t-he objection is also serious to a greater or lesser degree. Various means have been devised for prevent-ing this accidental operation of the thermostat thermometer, but so far as can be ascertained without success.

Among t-he objects of the present improvements is the provision of al thermostat thermometer, with means for absorbing shocks and vibrations, and preventing them from affecting the Huid therein, thus rendering them safe, dependable and desirable for use under all conditions and in various surroundings, as, for instance, on ships, trains, automobiles, air ships, and other means of transportation. They are illustrated in the accompanying drawings referred to herein, and forming a part thereof.

In the said drawings, Figure l is an elevation of a thermostat device embodying the improvements; Figure 2is a bottom plan of the same, and Figure 3 is a vertical section 1919. serial no. 311,833;

on the line Bf of Figure 2 of the outer casmg, in elevation.

The casingof the thermometer is com-V posed of three parts, viz: the collar A, with .showing the partsenclosed therein external annular bottom 'flange A and sim- Y ilarmedial internal ange vA2, the foramiy.nous metal envelope. B and the tube C; The

parts B and C are externally threaded, and

the collar A internally threaded,.so lthat all i of the said parts are` removably secured together by securing the said partsinto the .said collar, the part B impingingagainst the internal flange A2 when inits innermost position. f i

A ring D is adapted'to lit inside the collar A and to rest against the iiange A2, and to this ringare secured spiral springs E and v F, one extending upwardly and the other downwardly therefrom. The ring is secured in posit-ion in the collar A by being clamped between the end ofthe ltube C andthe annular flange A2, and the ysprings E and F are secured to the ring slightly inside its periphery, so that they will clear the casing andv the said flange.

The thermometer consists vof a bulb portion G and stem Gr', and is provided at the top and bottom of its .stem with collars H and I clamped` thereon, but insulated therefrom by sleeves of soft rubber or other suitable elastic non-conductor H and I. To the collar H the outer end of t-he spiral spring E is securedkby solderino' or other suitable meansjand lto the collar I the outer end of 1 the spring F is similarly secured.

The opposite ends of the springs may bek secured to the ring D in the same manner. The springs may be made of brass or other resilient material, and are preferably so Y formed that the coils decrease in diameter from the ring D to the collars, thus preventing the said collars or the bulb of the ther- .f

lUD'

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usual insulated open circ-uit wires J and K, leading` to an alarm or other electrically operated device for indicating the rise in temperature, upper part of the stem and communicatingr` with the bore of the same, and the Wire K communicatingv with the bulb, so that when the tluid rises to the levelV ot the terminal ot' the wire J the circuit is closed. An insulating sleeve L surrounds the terminal of tlie wire K, and protects it trom contact Vith the spring` ,E or the casing, and a similar sleeve Mr' surrounds the terminal of the wire K.

, 1t will be apparent that various changes in details of construction may be made without departing` from the spirit and scope of the invention. Thus the character ot' the spring shock-absorbing medium maiT vary,v

and the connect-ion between it and the thermometer casing on the one hand and the thermometer on the other may be changed. rl`he external annular flange A is provided with screw holes A3 by means of which it ma;7 be secured to any hat` surface it desired, so that the envelope B will project beyond. Various other 'additions and modiiications ma;7 be made-it' desired.

That I claim is: Y

l. A device ot the character described, comprising a hollow casing, a thermometer mounted within said casing, and a resilient the wire Jebeing secured tothe Ying and out ot contact therewith,

connection between said easing` and the sides ot said thermometer and surrounding the latter, said connection being secured to the casing atone point and secured to the thermometer at a point distant therefrom, and being` vet slightly less diameter than the internal diameter ot the easing` at the point ot its connection with'the said thermometer.

2. The combination of a hollow rigid casing, composed ot detachable sections, a therniometer or the like mounted within said casa spring, a lrigid member to which one end of said spring is secured, said member being attached i to the casing` at the junction of two ot its sections.v and said spring extendingaway from the rigid member and being out ot contact with the casing and secured at the other end to the thermometer.

3. The combinationy of a casing, springs mounted therein and extending,` longitudinail)r thereof, a thermometer secured to said springs at points near the extremities thereot and a connection between said springs and the casing, said springs being ont of contact with the casing between the points of their attachment thereto and the points of y their connection I withl the thermometer.

fitness my hand this 12th day ot July, 1919, at'the citi7 of New York, in the county and State of New York.

MAXv E. MOELLER. 

